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That increase in Ford Mach-e was simply due to buffer reduction that Ford set aside in the battery to not allow it to charge over it. They deemed the buffer was too large beacuse state of charge can be brought near absolute maximum and no battery degradation occurs. There is no change in any chemistry or physical layout. My Mach-e's battery, according to Carscanner is at 99.5% health after about 1 year of usage and 10k miles. Not bad at all.
I really hope that they have learned their lesson with early announcements, pictures, reservations, pricing, etc. etc. Do what most others do - release a few close ups, a dark silhouette, a cloth draped picture of the whole vehicle, etc. over time to keep interest high without giving it all away up front. And certainly don't set pricing and delivery dates like they did with the R1 !!!!
Just like Tesla, they improve efficiency as they learn. Just in the way the vehicle uses its power, which leads to better efficiency. Tesla had constant updates that improved efficiency, resulting in better range. Ford did the same. 5 miles more range is a good thing. 17 miles more range from the same battery size would be a very good thing (5%) for doing nothing on our end!! I'll gladly take it!!
As @mikehmb noted, they are not using anywhere near 4kwh per day typically. I usually see about 1% per day, and at least some of that is may simply be tied to the battery temp dropping and not actually phantom drain. It increases further when cold, but some of that is also literally due to changing battery temp and not phantom drain. For example, I've had the BMS say SOC increased as the battery warmed up.
Actually, my 2018 Outback drained three batteries to death over the nearly 5 years I had it. I think the shortest time period was 9-10 days, sitting in the garage, not being driven or disturbed. Subaru replaced all three "under warranty". Rivian isn't the only manufacturer out there dealing with battery drain.
Very much so. With temps in the 10s and 20s F and the truck parked outside, I see about 5% loss in 24 hours. That is Over 6kWh! In the (cold) garage it drops to about 3% per 24 hours but that is still a lot. In the summer (70s-90s) it has hovered around 2.5% per 24 hours which I think is the case for a lot of folks. The only time ive ever seen less than 1% was in shipping mode during the summer.
I've reported it to them - they just haven't gotten back to me yet with a real answer. I have no doubt something's wrong, but I have seen some others complain as well not just me.
I fully understand the part of them taking it seriously enough. I don't understand why they don't have a mobile, rapid response team, that goes to any report from a service center that shows a global issue might exist, tear into it immediately, and implement a fix asap.
It is a math thing…. Calculated out at the nominal 3.6 volts the Samsung batteries published spec has it is 135 kWh for the 7776 cells. The image has it at 3.92 volts which would the calculate out to the 141 kWh.
